Aerostructure Nondestructive Evaluation by Thermal Field Detection. Phase II. Technique Refinement and Quantitative Determination of Flaw Detection Capabilities.
VILLANOVA UNIV PA
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This report describes the second phase of a program to evaluate and develop methods of flaw detection in laminated fiber composites using infrared radiation detection techniques with application to inspection of aerovehicle structures. Analytical heat transfer studies and experiments were conducted on graphiteepoxy, glassepoxy and glasspolyester laminates containing simulated delaminations and impact damage. The externally applied thermal field EATF technique uses a radiant heater to create hot spots on a composite laminate surface above thermal breaks caused by delaminations and other flaws. The stress-generated thermal field SGTF technique requires heat to be generated near flaws by cyclic stressing.
- Laminates and Composite Materials
- Test Facilities, Equipment and Methods